THE PTEJilDOPIIYTA 



337 



an 



Fig. 210. — Gametophyte of Lycopodium, showing the stout, subterranean, 

 tuber-like portion and the upper region in which antheridia (an) and archegonia 

 {ar) are produced. (From Strasburger, after Bruchmann). 



Fig. 211. — Selagmella. .4,. leafy branch bearing strobili (s). B, megasporo- 

 phyll or cone-scale bearing a megasporangium. One of the four megaspores 

 produced in this sporangium is shown at the left. C, microsporophyll or cone- 

 scale bearing a microsporangium. One of the many microspores produced in this 

 sporangium is shown at the left. 

 22 



